Isuzu attempts to steal the Neo Durandal at gunpoint. But when he's confronted with the painful truth that he's the only one not "Universing" (=awakening to the Universe Sense), he leaves his family behind. And thus, Subaru and Isuzu part ways once more.
Subaru, your naïveté will
get you killed one day.
Subaru, tu ingenuidad hará
que termines muerto un día.
Subaru,
ta naïveté te coûtera la vie, un jour.